Bicycle chain guard



FIG. 1 is a front elevational view of a bicycle chain guard showing my new design.

FIG. 2 is a top plan view.

FIG. 3 is a cross sectional view taken on line 3-3 of FIG. 1.

FIG. 4 is a rear elevational view thereof. 

The ornamental design for a bicycle chain guard, as shown. 